Drive mechanism for shaker conveyers



July 12,1938. w. w. SLOANE 2,123,585

DRIVE- MECHANISM FOR $HAKER CONVEYIERS Filed March 13. 1-936 3Sheets-Sheet 1 I l 3 g i July 12 1938; w w SLQANE I n 2,123,685

DRIVE MECHANISM FQR SHAKER CONVEYERS Filed March 13. 1956 3 Sheets-Sheet2 I l I I July 12, 1938.

w. w. SLOANE- DRIVE'MECHANISM FOR SHAKER CONVEYERS Filed March 1s v19s6s Sheets-Shee 5 Wlu L Patented July 12, 1938 UNITED STATES PATENT OFFICEDRIVE MECHANISM FOR SHAKER CONVEYERS Application March 13, 1936, SerialNo. 68,618

19 Claims.

This invention relates to improvements in drive mechanisms for shakerconveyers of the type utilized for conveying loose material such as coaland more particularly to drive mechanisms in which the conveying actionmay be varied and the direction of coal travel may be reversed under thecontrol of the operator.

More specifically the presentinvention is directed to improvements inconstruction of the type of mechanism disclosed in my prior application,Serial No. 746,979, filed October 5, 1934, which matured into Patent No.2,077,593, and has as one of its objects to provide a drive whereby theconveyer pan line may be driven from rocking arms and puller arms ratherthan directly from a rotatable crank and pitman, which mechanism isarranged in a novel manner to effect a drive wherein the direction ofcoal travel may be reversed under control of the operator.

Another prior application, Serial No. 57,730, filed January 6, 1936,shows a variable conveyer drive mechanism wherein a crank, rotatablydriven at a variable angular velocity, reciprocably drives a conveyerpan line by means of a rocking 25 member rocked by a connecting rodjournaled on said crank. The device of my present invention differs fromthe device of my prior application in that it is reversible and in thatthe variably rotatable drive mechanism and connecting rod are soarranged that the driving effect of the connecting rod is relativelymoderate and is added to the driving effect of the variablyrotatablecrank when arranged to convey material in a forward directionand subtracted from the driving effect of said crank when arranged toconvey material in a reverse direction. This results in a drivemechanism so arranged that the driving effect of the crank is greaterwhen the variably rotatable drive mechanism is arranged to conveymaterial in a reverse direction than in a forward direction so that thedriving effect of said rotatable drive mechanism in a reverse directionmay counteract the driving effect of the connecting rod in a forwarddirection and attain a final conveying effect 45 of the mechanism whichwill be the same for similar settings of the drive mechanism in bothforward and reverse directions.

Other objects of my invention will appear from time to time as thefollowing specification proceeds.

My invention may be more clearly understood with reference to theaccompanying drawings wherein:

Figure 1 is a top plan. View of a conveyer drive mechanism constructedin accordance with my invention, connected to a conveyer pan line, withparts of the pan line broken away;

Figure 2 is a fragmentary plan view of the device shown in Figure l,with certain parts broken away and shown in horizontal section in orderto more clearly illustrate certain details of my invention;

Figure 3 is a side elevation of the device shown in Figure 1, withcertain parts broken away and shown in longitudinal section;

Figure 4 is an enlarged partial fragmentary longitudinal sectional viewthrough the variably rotatable drive mechanism and taken substantiallyalong line 44 of Figure 2, showing the parts of said drive mechanismpositioned for conveying material along a conveyer pan line in onedirection;

Figure 5 is a view somewhat similar to Figure 4, but with the partspositioned for conveying material along the conveyer pan line in anopposite direction;

Figure 6 is a sectional view taken substantially along line 66 of Figure5;

Figure 7 is an enlarged detail sectional view showing certain details ofthe ;means for indicating the position of the parts for varyingconveying actions;

Figure 8 is an enlarged detail sectional view showing certain details ofthe indicating mechanism shown in Figure 7; and

Figure 9 is a diagram or graph showing certain hypothetical velocitycurves of shaker motions attainable by the shaker mechanism.

Referring now to the drawings which illustrate a preferred embodiment ofmy invention, a shaker conveyer drive mechanism, generally indicated byreference character I0, is provided. Said drive mechanism is mounted ona base plate I I which is adapted to be held in position on the minebottom in the usual manner; as, for instance, a plurality of mine jacksat the corners thereof and indicated generally by reference charactersI2, I2.

The general arrangement of the drive mechanism and the details of thegear reduction mechanism utilized therein are similar to those shown anddescribed in my aforementioned prior application, Serial No. 746,979,(Patent No. 2,077,593), but as all of said parts cooperate to producethe desired variations in shaking motions including reversal thereof,said parts will herein be briefly described. s

A casing I 3 is mounted on the base plate I I in a suitable manner as bywelding and comprises a cylindrical portion I4 serving as a support andhousing for planetary gear reduction mechanism, generally indicated byreference character I5, and a forwardly extended portion l6 which formsa bearing support for a transversely disposed rocking shaft I.

Said rocking shaft is provided with a pair of rockingarms l8, l8disposedat opposite-ends thereof and herein shown as extending upwardlytherefrom. Said rocking arms are adapted to have suitable connecting orpuller rods l9 pivot-- ally connected thereto which in turn are connected at their free ends with opposite sides of a shaker conveyertrough 20 in a usual manner well known to those skilled in the art .(seeFigures l and 2).

The rocking arms l8, are rocked by means of a rocking arm 2| keyed tosaid shaft within the casing i3, and depending- Said rocking armisrockedbyfrom said shaft. a variably rotatable crank 22 by means of arelatively long connecting rod 23. It should herein be noted that thecrank 22, connecting rod 23 and rocking arm 2| areso arranged that saidcrank will rock said rocking arm atequal angles to a line extendingthrough the center of the rocking shaft l1 and disposed perpendicular tothe longitudinal center line of the connecting rod 23 when in a deadcenter'position. Therocking arms I8, l8 will in turn be rocked at equalangles to a line extending through the rocking center of said arms andperpendicular tothe longitudinal center line of the puller arms |9 whensaid puller arms are at either of the extreme ends of their stroke; Thepurpose of this arrangement is to'moderate'the conveying effect of saidconnecting rod and rocking arms as much as possible.

The crank 22 isjournaled'at one of its ends in a suitable end plate forthe casing l3 and has a cage 25 of the planetary gear mechanism "15keyed to its opposite end. Said cage and crank shaft are journaled on aball bearing26 mounted on the hub of said cageand'engaging a shoulderedbearing surface 21 formed in a supportmember 28 rotatably mounted in thecylindrical portion M of the casing l3.

The crank 22 and planetary gear mechanism l5 are driven from a suitablemotor 29'secured to one end wall of the casing l3 in a usual manner.Said motor is herein shown as beingof the electric type having afiywheel 30 keyedon its motor shaft within the motor casing formoderating fluctuations'in speed of said motor.- Saidmotor is providedwith a motor pinion 3| which meshes with and drivesan idler gear 33.Said idler gear meshes with and drives a spur gear 34-'on a shaft 35.Said shaft, is journaled'at one of its ends in'an end plate 35 disposedoppositelyfrom-the end plate 24 and is journaled intermediate its endsin a suitable bearing member 31 supported in a side wall 38 of saidcasing. Said shaft has a spur gear 39 keyed to its inner end which spurgear forms a sun gear for the planetary gearreduction mechanism l5.

The spur gear 39 meshes with-and drives planetary pinions 40, 4|] freelycarried 'on parallelspaced shafts 4|, 4| which shafts are'secured-attheir ends in the cage 25'in'a usualmanner'. Said pinions mesh with aninternal ring gear 43 which serves as a reaction member for-theplanetary gear reduction device. The outer periphery and side of saidring gear adjacent the end-plate36 abuts a shouldered portion of arotatable support member 44. Saidsupport member'extends outwardly overthe sides of the cage 25-and sun-gear I8 and rocking shaft I1 of thecrank 22.

' It will be apparent that rotation of the sun gear'39 will'rotate thecage 25 within the internal gear 43 when said internal gear is held frommovement. When said internal gear is rotated in the direction ofrotation of the cage 25, the speed of rotation of said cage will beincreased, and when said internal gear is rotated in an oppositedirection, the speed of rotation of said cage will be decreased; 1

Referring now particularly to the mechanism for changing the angularvelocity of the crank 22'which mechanism forms a part ofthe subjectmatter of the present invention, the same comprises a novel-arrangementfor rocking the internal gear 43 alternately in opposite directionsduring each revolution of said crank in such a manner that the variationin angular velocity of said crank will be greater when the parts arearranged to convey material along the trough line in one direction thanin anopposite direction in order to counteract the tendency of theconnecting rod 23 to move material along the trough line in a forwarddirection when the conveying action of the crank '22 is reversed.

As herein shown, my improved mechanism includes a crank 53 formedintegrally with the shaft for the crank 22 and disposed out of phasewith the crank 22 in a-manner similar to that described in a priorapplication, Serial No. 706,787, filed January 15, 1934, now Patent No.2,077,811.

In my improved construction, the crank 53 has bearing in ananti-friction bearing member 54 carried by a block 55. Said block isslidably guided between the prongs of a bifurcated portion 56 of anoscillating frameS'l. Said frame, as herein shown, oscillates'about arelatively long are so as to reduce'inaccuracies caused by angularityin-movement of said frame and extends to and'is journaled on therocking-shaft H (see Figures 2 and 3).-

The oscillating'frame 51 is provided with a hollow annular extension 59surrounding the crank 53. This annular extension forms a hub for arocking member 60 rotatably mounted thereon and provided with a pair ofoppositely disposed extensions 6| and 62. One of these extensions BI ispivotally connected by means of a relatively short link 63 to aprojection64 of the rotatable support member 28. support member ismounted within the cylindrical portion M of the casing I3 for rotatablemovement with respect thereto and has worm teeth formed on its outerperiphery. Its general arrangement and function is similar to that-ofthe worm gear rings previously employed in drive mechanisms of the sametype illustratedby my prior application, Serial Nor 746,979, (Patent No.2,077,593), namely, to change the angular position of the rocking member60 with respect to the oscillating frame 51 so as to control theviolence of the shaking action, and also by suitable adjustment, as willpresently appear, to reverse the direction ofshaking movement.

The'opposite projection 62-is-pivotally-con- Said rotatable nected to aprojection 66 which extends outwardly from the spider 46 forming asupport for the internal gear 43, as previously described, through alink 65 which is considerably longer than the link 63 and extends in thesame general direction as the link 63. Said projection extends through asuitable slot 61 formed in the rotatable support member 28 so that saidprojection and spider may reciprocably move with respect to saidrotatable support member.

A worm 69, herein shown as being formed integral with a shaft mesheswith the gear teeth formed in the outer periphery of the rotatablesupport member 28. Said shaft has hearing at its upper and lower ends inan enlarged portion H of the cylindrical portion M of the casing l3,which portion forms a housing for said worm which is manually controlledby a hand wheel 12.

A locking means is provided for restraining the rotatable support member28 from rotation. In the form shown, said support member is providedwith a plurality of apertures, indicated by reference characters l3, 14,I5, 16, 11 and 78, respectively, which are placed at suitable intervalsindicating the position of the parts where the most eflicient conveyingactions may be effected by the mechanism for moving material in either aforward or reverse direction commensurate with given stresses on thedrive and trough line. Said apertures are adapted to be selectivelyengaged by a spring-pressed plunger 19 mounted in a lug 8|! extendingoutwardly from said casing (see Figures 4, 5 and 6).

The plunger 19 is disengaged from any of said aforementioned aperturesby means of a pair of spaced lever arms 8| actuated by an operatinglever 82 (see Figure 1). The free ends of said arms engage the lowerends of projections 83, 83 extending inwardly from a member 84. Saidmember is secured to the outer end of said plunger and extends inwardlyalong opposite sides of the lug 8B.

It will be manifest that the greater the arc of movement of the internalring gear 43 during each revolution of the crank 22, the greater will bethe variation of the angular velocity of the crank 22 and the steeperwill be the line of the velocity curve, indicating the deceleration ofthe forward stroke resulting in an increase in material travel along thetrough line with a corresponding increase in stresses on the drive.

It will be observed in Figures 4 and 5 particularly, that the effectivearc of rocking movement of the internal ring gear 43 may be controlledby rotation of the rotatable support mem ber 28 through manipulation ofthe hand wheel 12. In Figure 4, the parts are positioned so that finalvelocity curve will be similar to curve A in Figure 9, and movement ofsaid support member in a clockwise direction from the position shown inFigure 4 will result in a gradual decrease in the arc of movement of theinternal gear 43, which will decrease the effectiveness of the conveyingaction until a point is reached where there will be no rocking movementof said internal gear.

It should be understood that a crank driven at a uniform angularvelocity and connected to a conveyer trough by means of a connecting rodwill reciprocably drive the trough, but the motion of the trough will besuch that there will beno movement of material along it except wheninclined down grade. If, however, the connecting rod is relatively shortand its free end is connected to a rocking member which in turn isconnected to the trough line, the trough line will be reciprocablydriven in such a manner that material will move along it when it isdisposed along the level. The foregoing is true with the device hereinillustrated, where the connecting rod 23 is longer than is usual fordrives of this type, when the rocking member 60 is-positioned so thatthe crank 22 rotates at a uniform angular velocity. The crank 22,however, has a conveying effect when rotated at a uniform angularvelocity which is due to angularity of its movement with respect to thetrough, but this is only sufficient to cause material tomove along thetrough line when inclined down grade. The connecting rod 23 and rockingarm 2| also have a distinct conveying effect. The final conveying actionwhen these parts are combined is, accordingly, the sum of theseconveying effects.

Movement of the support member 28 beyond the point where there is norocking movement of the rocking member 69 will cause said rocking memberto rock in an opposite direction than formerly and will reverse theconveying eifect of the crank 22 in a manner which has been clearlydescribed in my aforementioned prior application, Serial No. 746,979(Patent No. 2,077,593). The conveying effect of the connecting rod 23and rocking arms 2! and I8, however, is not reversed upon reversal ofthe conveying action of the crank '22 so is still in a forwarddirection. Thus, when the rocking member 69 is in this last-mentionedposition, the final conveying eifect of the drive will be the conveyingeffect of the connecting rod 23 and rocking arms I 8 and 2| subtractedfrom the conveying effect of the crank 22. When the support member ismidway between the apertures 75 and Hi, the conveying effect of thecrank 22 in a reverse direction will be neutralized by the conveyingeifect of the connecting rod 23 and rocking arms l8 and 2 i. Thevelocity curve of the drive will be similar to that indicated by curve Bof Figure 9, and the trough line will have no conveying effect, exceptwhen inclined down grade.

Further rotation of said rotatable support member in the same directionwill reverse the direction of movement of said internal gear and changethe phase of the peak of the acceleration curve so it will occur in thefirst 90 of the cycle of rotation of said crank. Still further rotationof said support member will gradually increase the arc of movement ofsaid internal gear and thus increase the effectiveness of the driveaction in a reverse direction until a point is reached where the plunger19 may engage the aperture 18 at which point the drive action will bethe same as indicated by curve A of Figure 9, but in a reverse directionand indicated by curve C of Figure 9.

It should herein be understood that it is desirable that the conveyingeffect of the rocking arms 26 and I 8 be moderate in contrast to theconveying effect of the crank 22. For this reason the length .of theconnecting rod 23 has been increased to reduce angularity in movementbetween said crank and the rocking arm 2 I. Angularity is also reducedby arranging the rocking arm 2: so it will rock at equal angles to aline intersecting its axis of rocking movement and perpendicular to thelongitudinal center line of the connecting rod 23 when in a dead centerposition and arranging the rocking arms l8, l8 so they will rock atequal angles to a line intersecting their axis of rocldng movement andperpendicular to the longitudinal center line of the con meeting rod "I9 when ateither ends of its'stroke, as hasIpreviously-been described. J

When the rocking member 60 1s positioned :to reversethe direction'oftravel of 'materialalong the trough line, the conveying effector therocking arms2l, 2lrocked by thercrank '22"' and connecting rod 23Siscounteracted 'by increasing the arc of movement of the internal gear 43and thus increasing the variationin angular velocity of the crank22."

This increasein the arc of movement'of said in ternal gear, when saidrocking memberisina reverse position, is attained by arranging the partsso that the vertical component of-movement of said internal gear is lessfor'a'forward position than for a corresponding reverse position, sothat the final conveyingeffect of the drive will be the same in either aforwardor reverse direction, as may clearly be seen with reference toFigures 4 and 5.

Thus, when the parts are positioned; as shown in Figure 5,- the finalconveying action of the drive will be the same as when positioned asshown in Figure 4, but in a reverse-direction and=-will be the conveyingeffect of the crank 22, minus the conveying effect of the connecting rod23 and rocking arms 2| and I8.

As a further feature of my'improved construction, I provide novel meansfor indicating the position of the parts and violence of-the drive whenthe rotatable support member 28 is in its various positions ofadjustment. As herein shown, a housing member 86 is mounted on the upperside of the cylindrical portion M of the casing l3 by means of capscrews 81, 81' (see Figures '7 and 8). Said housing member has anindicating pointer 88 mounted thereon for translational movement withrespect thereto. Said pointer is connected at its inner end to a member89 slidably guided in said housing member. The member 89 has a dependingportion 90 which is slidably mounted in a spiral groove 9| formed in theouter periphery of the rotatable support member 28. Suitable charactersor letters are herein shown as being provided on the outer face of thehousing member 86, as is best shown in Figure 'i, so said indicatingpointer may indicate the position of the parts when the plunger 19 isengaged with any of the apertures 13 to "I8, inelusive, and thusindicate the violence of the conveying action and the direction ofmaterial travel along the pan line.

While I have herein shown and'described one form of my invention, I donot wish to be limited to the precise details of constructionorarrangement of parts herein shown and described, excepting asspecifically'limited in the appended claims.

I claim as my invention:

1. In a shaker conveyer drive, a crank driven at a variable angularvelocity, a rocking arm, a connection from said rocking arm to aconveyer trough for reciprocably driving said conveyer trough and aconnecting rod connecting said crank with said rocking arm, and aplanetary geared reduction device for variably driving said crank, saidplanetary device including a reciprocably movable reaction member andmeans for reciprocably moving said reaction member during eachrevolution of said crank including an oscillating member driven by theshaft which. drives said crank, said'oscillating memberbeingoscillatable about an axis coaxial with the pivotal axis of saidrockingarm.

2. In a shaker conveyer drive, a crank driven at a variable angularvelocityya rocking arm,- a connection from said rocking arm'jtoaconveyer trough :for: reciprocably driving said conveyer trough and aconnecting rod connecting a said 'crankxwith said rocking :arm; and' aplanetary geared reductionrdevice for variably driving said crank,1saidplanetary device including a reciprocably movable reaction member andmeans for reciprocablyimoving-said reaction member during eachrevolutionj-of saidcrankincludingan oscillating member driven 'by theshaft which drives said crank, said oscillating: member beingoscillatableabout an arc whose radius is greater than thelengthiof"saidconnecting rod.

3. In a-shaker conveyer drive, a crank driven at a variable angularvelocity, a rockingarm, a connection from said-rocking arm to a conveyertrough"for-reciprocably driving. said conveyer trough" and a relativelylong connectingrod connecting said crank with said rockingarm, and aplanetary geared reduction-device for variably driving said crank-saidplanetary :device including are'ciprocably movable reactionmember andmeans for 'reciprocablymoving said reaction member during each"revolution of saidcrank including-'an-oscillatingmember of a-greaterlength than-said connecting rodand driven by the shaft-which drives saidcrank said oscillating member'being roscillativelymovable about an axisdisposed -parallel-to the pivotal axis of said crank: T a i 4. Inashaker conveyer-drive, a crank rotatable at a variable angular velocity,a rocking arm a connection from said rocking arm-toa conveyer trough forreciprocably-driving said conveyer 'trough'and a- 'connecting rodconnecting said crank with said rocking arm, and .a planetarygeared'reduction device fordrivinglsaid crank, said planetary deviceincluding a reciprocably movable reaction member;- andmeans forreciprocably moving said reaction member for varying the angularvelocity of said crank during each revolution thereof comprising. anoscillating member pivotallymovable about an axis coaxial with" thepivotal axis of saidrocking arm.

5. In- 'a-shakei" conveyer drive, a planetary geared're'duction deviceincluding a'driven crank, a movable reaction member for varying theangular-velocity of said: crank during each revolution thereof;means-for reciprocablymoving said reaction member; and meansforchangingthe positionof-saidmoving means forchanging theangularvelocityi-of saidcrank-and reversing-the direction of movement ofmaterial along said conveyer trough; and 'aconnection from said crankto-said conveyer trough for reciprocably driving said trough; said'connection having a conveying effect inone direct-ion and being arrangedso that this conveyi'ng eifectds added to the conveying effecttransmitted" by said crank-when the angular velocity: of said crank -isvariedby saidreactionl-member' in sucha manner as to cause material-tomove-along said= trough in one direction and 'subtractedi-from theconveying effect transmitted'by "said-r crank when the angular velocityof said crank is variedby said-reaction member in such 'a 'manner as-tocause material to move along said-trough in anopposite direction andincluding a-rocking'member and a'connecting rod connected between saidcrank and rocking member."

601m a shaker conveyer drive, a planetary geared reduction deviceincluding a driven crank,

a movable reaction member for varying the anguthereof, means forreciprocably moving said resaid trough, said connection having aconveying effect in one direction and being arrangedso that thisconveying effect is added to the conveying efiect transmitted by saidcrank when the angular velocity of said-crank is varied by said reactionmember in such a manner as to cause material tomove along said trough inone direction and. subtracted from the conveying efiect transmitted bysaid crank when the angular velocity of said crank is varied by saidreaction member in such a manner as to cause material to move along saidtrough in an opposite directionand including a rocking member, aconnecting rod connected between said crank and one lever, arm ofsaidrocking member for rocking said lever arm at equal angles to a lineextending through the center of said rocking member and perpendicular tothe longitudinal center line of said connecting rod when in a deadcenter position, a puller rod connectingsaid lever arm with saidconveyer trough, said last-mentioned lever arm rocking to equal anglesto a line intersecting the axis of rocking movement of said arm anddisposed perpendicular to the longitudinal center line of said pullerrod when in a dead center position.

= 7. In a shaker conveyer drive and in combination with a reciprocablydriven conveyer trough, a crank, an epicyclicgear train for driving saidcrank, said gear train including a reaction member movable in oppositedirections during each revolution of said crank, a rocking member forreciprocably moving saidreaction member, and means for shifting thepositionof said rocking member for changing the angular velocity of saidcrank to change the intensity of the conveying effect thereof andreverse the flow of material along said trough, a connection fromsaidcrank to said conveyer trough including a rocking arm and a relativelylong connecting rod connected between said crank and rock-,

ing arm, said rocking member and the connections therefrom to saidreaction member being so arranged that the final conveying effect of'said drive is the sum of the conveying effect transmitted by'said crankand the conveying effect ofisaicl connecting rod and rocking arm whenthe angular velocity of said crank is such as to convey material alongsaid trough in one direction and the difierence of the conveying effectstransmitted by said crank and the conveying efiect of said connectingrodand rocking arm when the angular velocity of said crank is such astoconvey material along said trough in an opposite direction. r

8. In a shaker conveyer drive, a crank rotatable ata variable angularvelocity, a rocking arm, a connection from saidrockingarm to a conveyertrough for, reciprocably drivingvsaid conveyer trough, and aconnectingrodconnecting said crank with said rocking arm, a planetary gearedreduction device for driving said crank, said planetary including areciprocably movable reactionv member,.,and means ,for reciprocablymoving said reaction member comprising, a rocking member rockableaboutan axisparallel to and rotating about the axis of rotation of saidcrank, a link connected fromone end of said rocking member to saidreaction member, another .link pivotally connected from the opposite endof said rocking member to a point adapted to be-flxed from movementduring operation of-the drive, and anoscillating member driven by themeans for driving said crank, for rocking said rocking membensaidoscillating member being pivotally movable about an axis coaxial-withthe pivotal axis of said rocking arm.

9. In a shaker conveyer drive and in combination with I a reciprocablydriven conveyer trough, acrank rotatably driven at a variable angularvelocity, a rocking arm, a connection from said rocking arm to saidconveyer trough forreciprocably driving said conveyer trough,

and a connecting rod connecting said crank with said rocking arm,-saidconnecting rod and rocking arm havingaconveying effect in one directiononly, means for driving said crank at a variable angular velocitycomprising a planetary geared reduction device having a movable reactionmember, and means for reciprocably moving said reaction membercomprising a rocking member having a movable fulcrum, means for changingthe position of the fulcrum of said than in a reverse direction tocounteract the conveying effect of said connecting rod and rocking armwhen material is'moved in a reverse direction along said-trough line.

10, In a shaker conveyer drive and in combinationfwith a reciprocablydriven conveyer trough, a crank rotatably driven at a variable angularvelocity, a rocking arm, a connection from saidvrocking arm to saidconveyer trough for reciprocably driving said conveyer trough and aconnecting rod connecting said crank with said rocking arm, saidconnecting rod and rocking arm havinga conveying effect in one directiononly, means for driving said crank at a variable angular velocitycomprising a'planetary geared reduction device having a movable reactionmembenandmeans for reciprocably moving said reaction member during eachrevolution of said crank for varying the angular velocity thereofincluding av rocking member, means for changing the position of thefulcrum of said rocking member for varying the extent of movement ofsaid reaction member and reversing the order of movement thereof forreversing the flow of materialalong said trough, and a connection fromsaid rocking member to said, reaction member for moving said reactionmember through a'greater arcwhen said rocking member is arranged toconvey material along said trough line in one direction than in areverse direction to.counteract the conveying effect ofsaid connectingrod and rocking arm wherrmaterial is moved in a reverse direction alongsaid trough line, and means for rocking said rocking member comprisingan oscillating arm pivotallymovable about an axis coaxial with thepivotal axis of said rocking arm.

11. In a shaker conveyer drive and in combination with a reciprocablydriven conveyer trough, av shaft having a crankthereon rotatably drivenat a variable angularvelocity, a rocking arm, a connectionfromsaidrocking arm to-said conveyertrough for .reciprocably drivingsaid conveyertrough, and a connecting rod connecting said crank withsaid rocking arm, said connecting rod and rocking arm having a conveyingeffect in one dir'e'ction-o'nly, mean's for'driving" said crank at avariable =anguiar velocity comprising a planetary'gearedreduction devicehaving a movable reaction member, andrneans for reciprocably moving saidreaction member comprising a rocking member having a movable fulcrum,means for changingthe position of the fulcrum of said rocking membei'for varying the extent of movement of said reaction member and reversingthe order of movement thereof for reversing the flow of material along"said trough, a connection from said-rocking member to said a reactionmember for moving said 'reaction member through a greaterarc when-saidr'ocking member is arranged to convey material along said trough lineinone directionthan in the reverse direction to counteract theconveying-effect of said connecting rod and rocking'armwhenmaterial'is'moved'in a, reversedirection along said trough line, andmeansfor'rocking said rocking member comprising an oscillating-memberoscillatably driven by said crank 'shaft='and pivoted for movement about'an axis coaxial with the pivotal axis of said rocking arm.

12. In a shaker conveyer drive, a driven shaft having a crank thereon,planetary drive gearing for driving said crank at a predeterminedvariable angular 'velocit'y'including a reaction member movable inopposite directions 'during each revolution of said cr nhand-means forreciprocably moving said reaction member in 'tirned relation with said:crank including a pivotally mounted oscillating "member,- aconnection-between said driven shaft and oscillating member,

and a connection between said oscillating member and reaction -memberincluding a rocking member pivotally mounted on said oscillating:

member, a link pivotally" connecting one end'of said rocking -memberwith said reaction-mem mounted oscillating member, a connection-betweensaid driven shaft and oscillating-member, and a connection between saidoscillating member and reaction member including a "rocking member,pivotally; 'm'ounted-"on said oscillating membena linkpivotallyconnecting one end of said rocking memben-with'said reaction-member, arotatable support'member' adapted to be fixed from'movementduring'operation of said---conveyer, and another'link 'sho'rter than-sai'd firstmentioned linkgand extending in thesame general direction assaid-'first-'-mentioned link for pivotally connecting the" other end ofsaid rock-v ing member with said support member.

14. In a -shaker conveyer drive, acrank driven at a variable angularvelocity, a--rocking arm, a connection from said rocking'arm t0atonveyer-trough for reciprocably driving said conveyer trough and aconnecting rod connecting said crank with said rocking arm, a planetarygearedreduction device for variably driving said crank, said planetaryincluding a reciprocably ing member with saidreaction-member,asupportmember adapted to be fixed from movement during operation ofsaid conveyer; and-another link extending in the same general directionas said first-mentioned link pivotally connectingthe other end of saidrocking member with said support member.

'15. In a shaker conveyer drive, a crank rotatable at a variable-angularvelocity, a rocking arm, a connection from said rocking arm to aconveyer trough for reciprocably driving said conveyer trough-and aconnecting rod connecting said crankwith said rocking arm, aplanetarygeared reduction device for driving said crank, said planetary includinga reciprocably movable reaction member, and means for reciprocablymoving said reaction member for varying the angular velocityof saidcrank during each revolution thereof comprising an oscillating memberpivotally movable about an axis coaxial 'with the pivotal axis of saidrocking arm, a rock- -ing member pivotally mounted on saidoscillatinglmember, a-link pivotally' connecting one end of "saidrocking-member with said reaction-member, asupport member adapted-to'befixed from movement during operation of said conveyer, and another linkextending in the same general direction as saidfirst inentioned linkpivotally connecting the other end I ofsaid rocking member with saidsupport member.

' 16. In a shaker conveyer drive, a crank-driven at a variable angularvelocity, a rocking arm, a connection' from Said rocking arm to aconveyer trough forreciprocably' driving said conveyer trough anda-relatively long connecting rod connecting said crank with said rockingarm, a planetary: geared reduction-device for variably driving saidcrank, said planetary including a reciprocably movable reaction memberand means 'fo-r' reciprocably moving said reaction member during eachrevolution of said crank including an oscillating member of a greaterlength thansaid connecting rod and driven by the" shaft which drivessaid crank, ,Said oscillating member 'being' oscillatively movable aboutan axis disposed parallel to the pivotal axis of said crank, a rockingmember pivotally mounted on said oscillating member, a link pivotallyconnecting one end ofgsaid 'ro'cking member with said reaction member,a'support memberadapted to be fixed from movement during operation ofsaid conveyer, and another link shorter than said first-mentioned linkextending in the same general direction as, said first-mentioned linkpivotally connecting the; other end of saidrocking member with saidsupport member.

"17. In a shaker conveyer drive, a crank driven at a variable angularvelocity, drive. gearing for variablyjdriving saidcrank including areciprooably'movable reaction member, means for varying the degree ofmovementof said reaction member and changing the conveying efi-ect ofsaid drive including a member adjustable about an axis coaxial withpivotal axis of said reaction member, and means for indicating theposition of said adjusting member and the conveying effect of the driveincluding an indicating pointer and means on said adjustable memberadapted to engage said pointer whereby rotation of said member will movesaid pointer to a position corresponding to the drive position of theparts.

18. In a shaker conveyer drive, a crank driven at a variable angularvelocity, drive gearing for variably driving said crank including areciprocably movable reaction member, means for varying the degree ofmovement of said reaction member and changing the conveying effect ofsaid drive including a member adjustable about an axis coaxial withpivotal axis of said reaction member, and means for indicating theposition of said adjusting member and the conveying efi'ect of the driveincluding an indicating pointer and a groove formed in the outerperiphery of said member and adapted to move said pointer upon rotationof said member to a position corresponding to' the drive position of theparts.

19. In a shaker conveyer drive, a crank driven at a variable angularvelocity, drive gearing for variably driving said crank including areciprocably movable reaction member, means for varying the degree ofmovement of said reaction member and changing the conveying effect ofsaid drive including a member adjustable about an axis coaxial withpivotal axis of said reaction member, and means for indicating theposition of said adjusting member and the conveying effect of the driveincluding an indicating pointer extending transversely of said member,and a spiral guide formed on the outer periphery of said; member adaptedto move said pointer upon rotation of said member to a positioncorresponding to the drive position of the parts. WILLIAM W. SLOANE.

